Buoyancy device



FIG. 1 illustrates a perspective view showing my new design;

FIG. 2 illustrates a side view thereof;

FIG. 3 illustrates a top plan view thereof;

FIG. 4 illustrates a flat, internal view of one of two panels forming the lower portion of my design;

FIG. 5 illustrates a perspective view showing an alternate embodiment of my new design;

FIG. 6 illustrates a side view of FIG. 5;

FIG. 7 illustrates a top plan view of FIG. 5; and,

FIG. 8 illustrates a flat, internal view of one of four panels forming the lower portion of FIG. 5.

The other elements of the buoyancy device are not being shown in FIGS. 4 and 8 for convenience of illustration. 

The ornamental design for a buoyancy device, as shown and described. 